A kind of modified silica sol and its preparation method and application in all water-based foamed polyurethane spray foam

A silica sol and modification technology, which is applied in the field of spraying process and the storage and stratification of polyol components of foam compositions, can solve the problems of poor compatibility and easy stratification of polyol components, and achieves improved compatibility, Improve adhesion and solve the effect of sagging

Active Publication Date: 2022-05-24
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first technical problem to be solved by the present invention is to provide a modified silica sol, which is used in the polyol component of the all-water-based foaming polyurethane spray foam to solve the problem of polyol component phase caused by high water content. Poor tolerance and easy delamination

Method used

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  • A kind of modified silica sol and its preparation method and application in all water-based foamed polyurethane spray foam
  • A kind of modified silica sol and its preparation method and application in all water-based foamed polyurethane spray foam
  • A kind of modified silica sol and its preparation method and application in all water-based foamed polyurethane spray foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of modified silica sol: 4000g deionized water, 2400g silica sol (SiO 225%), 800g of Mannich polyether 3776, and 320g of bis(dimethylaminoethyl)ether were added to the reactor, stirred at room temperature for 30min, the pH value was 7.6, the mixture was heated to 60°C, and the dropwise addition was started at the same time. The dropping amount of KH570, KH550, KH570 and KH550 were all 240g, and the dropping time was 2 hours. After the dropping was completed, stirring was continued at 70°C for 2.5 hours, and cooled to room temperature to obtain a highly stable modified silica sol, which was ready for use.

[0042] Preparation of polyol components: 7000g EP-551C (ethylene oxide-propylene oxide copolyether triol, hydroxyl value 54~58mgKOH / g), 1600g CHP-H28 (polymer polyol, hydroxyl value 25~29mgKOH / g) / g), 4400g TCPP, 240g N-methyl N'-hydroxyethylpiperazine, 200gL6900 were placed in a mixing container, after stirring at 50 ° C for 30min, the modified silica sol ...

Embodiment 2

[0045] Preparation of modified silica sol: 4800g deionized water, 1600g silica sol (SiO 2 35%), 680g of Mannich polyether 3776, and 400g of bis(dimethylaminoethyl)ether were added to the reactor, stirred at room temperature for 30min, the pH value was 7.8, the temperature of the mixture was 65°C, and the simultaneous dropwise addition was started. The dripping amount of HD-109, KH560, HD-109 and KH560 are all 320g, and the dripping time is 2.5h. After the dripping is completed, continue stirring at 70°C for 3h, and cool to room temperature to obtain a highly stable modified silica sol. stand-by.

[0046] Preparation of polyol components: 7200g EP-3600 (ethylene oxide-propylene oxide copolyether triol, hydroxyl value 26-30mgKOH / g), 1600g CHP-H45 (polymer polyol, hydroxyl value 19-23mgKOH) / g), 4000g TCEP, 300g N,N,N'-trimethyl-N'-hydroxyethyl bisaminoethyl ether, 260g L6863 were placed in a mixing vessel, after stirring for 30min at 30°C, 6200g was added under stirring The pr...

Embodiment 1、 Embodiment 2

[0051] Embodiment 1, embodiment 2, comparative example foam preparation:

[0052] The spray foam was prepared using a DF20 / 35 sprayer (Beijing Dongsheng Futian Co., Ltd.), and the process parameters were set as follows: polyol component material temperature 55°C, pressure 1100 psi; isocyanate component material temperature 55°C, pressure 1100 psi. The base material is an aluminum plate frame, which is sprayed and foamed by simulating a bus painting production line. Record the foam rise time; observe whether there is sagging during the spraying process; after spraying is completed, after the foam material is placed at room temperature for 15 minutes, the foam body is destroyed, peeled off from the aluminum frame, and the interior of the foam body and the interface between the foam body and the substrate are observed for voids or not. , the proportion of foam material attached to the surface of the aluminum frame. The experimental results of the spraying process are recorded in...

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Abstract

The invention discloses a modified silica sol, a preparation method thereof and an application in all-water-based foaming polyurethane spray foam. The raw material components of the modified silica sol include: deionized water 40%~ 60%, silica sol 20% ~ 40%, cosolvent 8% ~ 16%, pH regulator 2% ~ 8%, silane coupling agent A 2% ~ 6%, silane coupling agent B 2% ~ 6% ; The silane coupling agent A refers to the silane coupling agent containing lipophilic groups, and the silane coupling agent B refers to the silane coupling agent containing hydrophilic groups. The preparation method includes the following steps: adding deionized water, co-solvent, silica sol, co-solvent, and pH regulator into the reactor, stirring and mixing for 20-30 minutes, the pH value is 7.5-8, heating up to 40-80°C, and starting Add the silane coupling agents A and B dropwise, and continue to stir at 40-80°C for 2-3 hours after the dropwise addition to obtain the modified silica sol. The modified silica sol is used in the polyol component of the all-water-based foaming polyurethane spraying foam, and solves the problems of poor compatibility and easy delamination of the polyol component caused by high water content.

Description

technical field [0001] The invention belongs to the field of water-based foaming polyurethane spray foam, and particularly relates to a spraying process and the storage and stratification of polyol components of a foam composition. Background technique [0002] Compared with traditional materials, the advantages of all water-based foaming polyurethane spray foam are more prominent: including (1) 100% water-based foaming, zero ODP, in line with environmental protection requirements; (2) low foam density, light weight, energy saving, and cost saving ; (3) The foam material has high open porosity and good sound absorption effect; (4) The production efficiency is high. Based on the above advantages, all-water-based foamed polyurethane spray foam can be used in passenger car interiors, building interior wall thermal insulation and sound-absorbing materials, etc. With the improvement of environmental protection requirements and the pursuit of comfort for drivers and passengers, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/36C08K9/06C08G18/40C08G18/48C08G18/63C08J9/08C08G101/00
CPCC08G18/4072C08G18/4837C08G18/632C08K9/06C08K3/36C08G2110/0083
Inventor 李宁董火成孙嘉鹏陈总赵修文
Owner LIMING RES INST OF CHEM IND
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